Pythagoras's Theorem is used to determine if a triangle is a right triangle or not.
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The Triangle is my favorite shape.
I learned about isosceles triangles in school last Thursday.
In an obtuse triangle, one angle is obtuse and the other two are acute. "The buildings are arranged in an obtuse triangle and occupy most of the long, thin parcel of land."
A scalene triangle normally has three different side lengths and three different acute angles that add up to 180 degrees.
An obtuse triangle has one of its angle greater that 90 degrees.His plate was in the shape of an obtuse triangle.